Dripless nozzle

RELATED APPLICATIONS

0001The subject patent application is a continuation of and claims priority under 35 USC § 120 from U.S. patent application Ser. No. 10/882,639 filed on Jul. 2, 2004 now U.S. Pat. No. 6,983,772.

FIELD OF THE INVENTION

0002The present invention relates to fuel dispensing systems for dispensing fuel into a vehicle fuel tank. More particularly, the present invention relates to a dripless fuel dispensing nozzle for dispensing fuel into a vehicle fuel tank.

BACKGROUND OF THE INVENTION

0003Various nozzles have been proposed for use in fuel dispensing systems to transfer fuel from a storage tank to a vehicle fuel tank. Environmental and/or safety concerns have dictated that nozzles of a fuel dispensing system be designed to prevent fuel from dripping from the spout of the nozzle after the nozzle is removed from the vehicle fuel tank and returned to the dispenser.

0004U.S. Pat. Nos. 5,377,729; 5,645,116; 5,603,364; 5,620,032; and, 6,520,222 disclose various nozzle structures designed to prevent fuel from dripping from the spout once it is removed from a fuel tank. These designs have numerous inherent disadvantages. For example, a number of these prior designs require complex valves to prevent fuel dripping from the end of the spout of the nozzle. These valves increase the cost and time to manufacture the nozzle. Further, these prior designs all include a relatively large obstruction centrally located in the channel or passageway through which fuel travels through the nozzle and hence unnecessarily restrict the flow of fuel through the nozzle when a vehicle is being refueled.

OBJECTS AND SUMMARY OF THE INVENTION

0005An object of a preferred embodiment of the present invention is to provide a novel and unobvious nozzle that prevents excessive dripping from the end of the spout of the nozzle upon removal of the nozzle from a vehicle fuel tank after the refueling process has been completed.

0006Another object of a preferred embodiment of the present invention is to provide a nozzle that overcomes one or more disadvantages of previously known nozzles.

0007A further object of a preferred embodiment of the present invention is to provide a nozzle that can be readily and inexpensively manufactured.

0008Still a further object of a preferred embodiment of the present invention is to reduce the obstructions in the fuel channel or passageway present in prior designs to minimize the obstruction or restriction of the flow of fuel through the nozzle in the refueling process.

0009Yet still another object of a preferred embodiment of the present invention is to provide a dripless nozzle that does not rely upon a complex valve arrangement to prevent fuel dripping from the end of the spout of the nozzle.

0010Yet another object of a preferred embodiment of the present invention is to provide a structure that can be readily retrofitted to existing nozzles to prevent dripping from the end of the spout of the nozzle.

0011It must be understood that no one embodiment of the present invention need include all of the aforementioned objects of the present invention. Rather, a given embodiment may include one or none of the aforementioned objects. Accordingly, these objects are not to be used to limit the scope of the claims of the present invention.

0012In summary, one embodiment of the present invention is directed to a nozzle for dispensing fuel into a vehicle. The nozzle comprises a body portion and a spout extending from the body portion. The spout passes fuel from the body portion to a vehicle. The body portion includes a fuel flow control member for allowing or preventing fuel from passing through the body portion and the spout to the vehicle. The spout has a first portion and a second portion. The first portion of the spout is positioned adjacent the body portion while the second portion of the spout is removed from the body portion. The first portion of the spout has a cross-sectional area greater than the second portion of the spout. A first fuel collection member is provided for collecting fuel remaining in the body portion and the spout after the fuel control member shuts-off the flow of fuel through the body portion and the spout. The first fuel collection member extends into the first portion of the spout and the second portion of the spout.

0013Another embodiment of the present invention is directed to a nozzle for dispensing fuel into a vehicle. The nozzle includes a body portion and a spout extending from the body portion. The spout passes fuel from the body portion to a vehicle. The body portion includes a fuel flow control member for allowing or preventing fuel from passing through the body portion and the spout into the vehicle. The spout has first and second portions. The first portion of the spout is positioned adjacent the body portion and the second portion of the spout is removed from the body portion. A first fuel collection member is provided for collecting fuel remaining in the body portion and the spout after the fuel control member shuts-off the flow of fuel through the spout. At least a portion of the first fuel collection member extends into the first portion of the spout. A second fuel collection member is provided for collecting fuel remaining in the body portion and the spout after the fuel control member shuts-off the flow of fuel through the spout. The second fuel collection member is located in the second portion of the spout.

0014A further embodiment of the present invention is directed to a nozzle for dispensing fuel into a vehicle. The nozzle includes a body portion and a spout extending from the body portion. The spout passes fuel from the body portion into a vehicle. The body portion includes a fuel flow control member for allowing or preventing fuel from passing through the body portion and the spout into the vehicle. The spout has first and second portions. The first portion is positioned adjacent the body portion and the second portion is removed from the body portion. The spout has a primary fuel collection area for collecting fuel remaining in the body portion and the spout after the fuel control member shuts-off the flow of fuel through the spout. The spout further includes a secondary fuel collection area for collecting fuel remaining in the body portion and the spout after the fuel control member shuts-off the flow of fuel through the spout.

0015Still a further embodiment of the present invention is directed to a nozzle for dispensing fuel into a vehicle. The nozzle comprises a body portion and a spout extending from the body portion. The spout passes fuel from the body portion to a vehicle. The body portion includes a fuel flow control member for allowing or preventing fuel from passing through the body portion and the spout into the vehicle. The spout has first and second portions. The first portion of the spout is positioned adjacent the body portion and the second portion of the spout is removed from the body portion. A first fuel collection member is provided for collecting fuel remaining in the body portion and the spout after the fuel control member shuts-off the flow of fuel through the spout. The first fuel collection member is press-fit into the spout.

0016Yet still a further embodiment of the present invention is directed to a nozzle for dispensing fuel into a vehicle. The nozzle comprises a body portion and a spout extending from the body portion. The spout passes fuel from the body portion to a vehicle. The body portion includes a fuel flow control member for allowing or preventing fuel from passing through the body portion and the spout into the vehicle. The spout has first and second portions. The first portion of the spout is positioned adjacent the body portion and the second portion of the spout is removed from the body portion. A first fuel collection member is provided for collecting fuel remaining in the body portion and the spout after the fuel control member shuts-off the flow of fuel through the spout. The first fuel collection member is fixed relative to the spout such that the first fuel collection member does not move relative to the spout.

BRIEF DESCRIPTION OF THE DRAWINGS

0017<figref idref="DRAWINGS">FIG. 1</figref> is an elevational view of a nozzle formed in accordance with the most preferred embodiment of the present invention.

0018<figref idref="DRAWINGS">FIG. 2</figref> is a cross-sectional view of the nozzle depicted in <figref idref="DRAWINGS">FIG. 1</figref>.

0019<figref idref="DRAWINGS">FIG. 3</figref> is an enlarged fragmentary cross-sectional view depicted in <figref idref="DRAWINGS">FIG. 1</figref>.

0020<figref idref="DRAWINGS">FIG. 4</figref> is a cross-sectional view of a portion of a nozzle formed in accordance with the most preferred embodiment of the present invention.

0021<figref idref="DRAWINGS">FIG. 5</figref> is an enlarged view of the portion I—I of <figref idref="DRAWINGS">FIG. 4</figref>.

0022<figref idref="DRAWINGS">FIG. 6</figref> is an enlarged view of the portion II—II of <figref idref="DRAWINGS">FIG. 4</figref>.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS OF THE INVENTION

0023The most preferred forms of the invention will now be described with reference to <figref idref="DRAWINGS">FIGS. 1–6</figref>. The appended claims are not limited to the most preferred forms and no term used herein is to be given a meaning other than its ordinary meaning unless accompanied by a statement that the term “as used herein is defined as follows”.

FIGS.

1

Through

6

0024Referring to <figref idref="DRAWINGS">FIGS. 1 to 3</figref>, a nozzle A is illustrated in one of many possible configurations. While the nozzle A depicted in <figref idref="DRAWINGS">FIGS. 1 to 3</figref> is of the vapor recovery type, the present invention is in no way limited to vapor recovery nozzles. Rather, the present invention can be used in any form of nozzle.

0025Referring to <figref idref="DRAWINGS">FIGS. 1 to 3</figref>, nozzle A includes a body portion B, a spout C, a vapor recovery shroud D, trigger mechanism E, a main valve F, a releasable latching mechanism G, a restrictor plug H and a vent tube I. The function of the vapor recovery shroud D and related vapor recovery components are well known and, therefore, will not be described herein. However, it should be noted that the vapor recovery shroud D and all related vapor recovery components may be omitted in their entirety.

0026When an individual grabs and raises handle <b>2</b> of the trigger mechanism E, the main valve F opens in a well known manner allowing fuel to pass through the body portion B of the nozzle A in the direction of the restrictor plug H. As seen in <figref idref="DRAWINGS">FIG. 2</figref>, the restrictor plug H is biased in a closed position by spring <b>4</b>. As the fuel flows through the body portion B, the force of the spring <b>4</b> is overcome and restrictor plug H moves toward the spout C allowing fuel to flow freely through the spout C and into the fuel tank of a vehicle. Fuel will continue to flow provided the handle is still engaged until such time as the opening <b>6</b> of the vent tube I becomes blocked. Upon reaching this condition, the releasable latching mechanism G is activated in a conventional manner to close the main valve F thereby preventing fuel from flowing to the spout C. Once the flow of fuel is discontinued, it is desirable to prevent residual fuel in the body B and spout C from dripping out of the end of the spout C. The preferred form of the invention concerns the spout C shown in <figref idref="DRAWINGS">FIGS. 2 through 6</figref>. While <figref idref="DRAWINGS">FIGS. 2 to 6</figref> illustrate the preferred form, the invention is in no way limited to the form depicted in these figures.

0027Spout C shown in <figref idref="DRAWINGS">FIGS. 2</figref>, <b>3</b> and <b>4</b> has a first section <b>8</b> and a second section <b>10</b>. The first section <b>8</b> is positioned directly adjacent the body portion B of the nozzle A. The second section <b>10</b> extends outwardly from the first section <b>8</b> and is removed or spaced from the body portion B, as seen for example in <figref idref="DRAWINGS">FIG. 2</figref>. The cross-sectional area of the first section <b>8</b> is greater than the cross-sectional area of the second section <b>10</b>.

0028Referring to <figref idref="DRAWINGS">FIGS. 2</figref>, <b>3</b>, <b>4</b> and <b>5</b>, a first fuel collector <b>14</b> is positioned adjacent of the juncture of first section <b>8</b> and second section <b>10</b> of spout C. More specifically, the first collector <b>14</b> preferably extends into both the first section <b>8</b> and the second section <b>10</b>. Preferably, the first collector <b>14</b> is substantially cylindrical in shape with a substantially uniform inner diameter. The outer wall of the first collector <b>14</b> is preferably stepped at the lowermost end. Specifically, the outer wall of segment <b>16</b> extends outwardly a distance greater than the outer wall of segment <b>18</b> of the first collector <b>14</b> as seen in <figref idref="DRAWINGS">FIGS. 3</figref>, <b>4</b> and <b>5</b>. This allows the outer wall of segment <b>16</b> to directly abut the adjacent portion of the inner wall <b>20</b> of spout C creating a seal that prevents fuel from passing between the inner wall of the spout C and the outer wall of segment <b>16</b>.

0029By spacing the outer wall of segment <b>18</b> of the first collector <b>14</b> from the inner wall of spout C, an annular collection area <b>22</b> is created for collecting residual fuel in the nozzle A after the flow of fuel is discontinued. Fuel is shown in collection area <b>22</b> in <figref idref="DRAWINGS">FIGS. 4 and 5</figref>. By locating the first collector <b>14</b> adjacent the juncture of the first section <b>8</b> and the second section <b>10</b>, the collection area is relatively large due to the larger cross-sectional area of the first section <b>8</b>. It should be noted that the first collector is effective act collecting residual fuel due to the fact that the residual fuel tends to travel along the inner wall of the spout C when the nozzle is pointed downwardly. Preferably, the first collector <b>14</b> is press fit into the desired position. As such, the first collector <b>14</b> is fixed relative to the spout C, i.e., the first collector <b>14</b> does not move relative to the spout C. While press fitting is preferred, it will be readily appreciated that other arrangements may be employed. For example, the first collector <b>14</b> and the spout C may be formed as one piece.

0030Referring to <figref idref="DRAWINGS">FIGS. 2</figref>, <b>3</b>, <b>4</b> and <b>6</b>, a second collector <b>24</b> is preferably formed adjacent the end of spout C. Preferably, the second collector <b>24</b> is substantially cylindrical in shape with a substantially uniform inner diameter. The outer wall of the second collector <b>24</b> is preferably stepped at the lowermost end. Specifically, the outer wall of segment <b>26</b> extends outwardly a distance greater than the outer wall of segment <b>28</b> of the second collector <b>24</b>. This allows the outer wall of segment <b>26</b> to directly abut the adjacent portion of the inner wall <b>20</b> of spout C creating a seal that prevents fuel from passing between the inner wall of the spout C and the outer wall of segment <b>26</b>. By spacing the outer-wall of segment <b>28</b> of the second collector <b>24</b> from the inner wall of spout C, an annular collection area <b>30</b> is created for collecting residual fuel in the nozzle A that is not collected in first collector <b>14</b> after the flow of fuel is discontinued through nozzle A. Fuel is shown in collection area <b>30</b> in <figref idref="DRAWINGS">FIGS. 4 and 6</figref>.

0031Referring to <figref idref="DRAWINGS">FIGS. 2 and 3</figref>, segment <b>28</b> has an opening formed therein so that the adjacent end of the vent tube I can extend through the second collector <b>24</b>. An annular rib <b>32</b> is formed on the outer surface of the vent tube I adjacent the opening in the segment <b>28</b> to prevent fuel from leaking from the collection area <b>30</b>. Preferably, the second collector <b>24</b> is press fit into the desired position. As such, the second collector <b>24</b> is fixed relative to the spout C, i.e., the second collector <b>24</b> does not move relative to the spout C. While press fitting is preferred, it will be readily appreciated that other arrangements may be employed. For example, the second collector <b>24</b> and the spout C may be formed as one piece.

0032While this invention has been described as having a preferred design, it is understood that the preferred design can be further modified or adapted following in general the principles of the invention and including but not limited to such departures from the present invention as come within the known or customary practice in the art to which the invention pertains. The claims are not limited to the preferred embodiment and have been written to preclude such a narrow construction using the principles of claim differentiation.